22686613 has 4 divisors (see below), whose sum is σ = 23468940. Its totient is φ = 21904288.

The previous prime is 22686611. The next prime is 22686617. The reversal of 22686613 is 31668622.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19027044 + 3659569 = 4362^2 + 1913^2 .

It is a cyclic number.

It is not a de Polignac number, because 22686613 - 2¹ = 22686611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22686611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391120 + ... + 391177.

It is an arithmetic number, because the mean of its divisors is an integer number (5867235).

Almost surely, 2^22686613 is an apocalyptic number.

It is an amenable number.

22686613 is a deficient number, since it is larger than the sum of its proper divisors (782327).

22686613 is an equidigital number, since it uses as much as digits as its factorization.

22686613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782326.

The product of its digits is 20736, while the sum is 34.

The square root of 22686613 is about 4763.0466090518. The cubic root of 22686613 is about 283.0891477066.

Subtracting 22686613 from its reverse (31668622), we obtain a square (8982009 = 2997²).

The spelling of 22686613 in words is "twenty-two million, six hundred eighty-six thousand, six hundred thirteen".